Q$2.(35$p$)$ Analyze the stability of the concrete gravity dam shown in figure below for overturning, sliding and the normal stresses at the base of the dam body for unusual condition. $(F_s=1\mathrm{.}8,F_o=1\mathrm{.}4).$ The height of dam is $1$ b m $(ab$ is the last two digits of your student number$).$ The following data will be taken in the solution: $f=0\mathrm{.}60,=0\mathrm{.}8,{}_s=6000k\frac{N}{m}2,{}_t=42000k\frac{N}{m^2},{}_c=30000k\frac{N}{m^2},{}_{\text{c}\text{a}\text{n}\text{c}}=24\mathrm{.}0k\frac{N}{m^2},{}_w=9\mathrm{.}8k\frac{N}{m^2},$ normal operating level is $90$ m $.$